第26题: [单项选择]______ your help we were successful. A. According to B. But for C. Owing to D. As for 参考答案:C 答案解析:according to是“根据,按照”的意思;but for是“要不是”的意思;owing to表示“由于”:as for表示“至于”。
第28题: [单项选择]Tom ______ the meeting last night, but he didn't as he suddenly fell ill. A. had attended B. should have attended C. could have attended D. must have attended 参考答案:B 答案解析:[分析] 在谈到那些本该发生而没有发生的事时, should或ought to应与不定式的完成式形式连用。例如:The plant is dead. Maybe I should have given